ISL8016EVAL2Z User Guide

Application Note 1631
Author: Tu Bui
6A Low Quiescent High Efficiency Synchronous Buck
Regulator - Small Form Factor
Description
TABLE 1. BILL OF MATERIALS
The ISL8016EVAL2Z kit is intended for use by individuals with
requirements for Point-of-Load applications sourcing from 2.7V
to 5.8V. The ISL8016EVAL2Z simple smallest factor evaluation
board is used for a quick and easy demonstration of the
performance of the ISL8016 low quiescent high efficiency
synchronous buck regulator.
REFERENCE
DESIGNATOR
DESCRIPTION
MFR
MFR PART
ISL8016EVAL2ZREVAPCB TBD
ISL8016EVAL2ZREVAPCB
C7
CAP, SMD, 0402, 47pF,
50V, 5%, NPO, ROHS
MURATA
GRM36COG470J050AQ
MURATA
C1-C6
The ISL8016 is offered in a 3mmx4mm 20 Ld QFN package
with 1mm maximum height. The complete converter occupies
0.15in2 area.
CAP, SMD, 1206, 22uF,
6.3V, 20%, X5R, ROHS
L1
COIL-PWR INDUCTOR,
SMD, 6.9X6.5, 0.68µH,
20%, 5.5A, 5mΩ, ROHS
Key Features
VO, VIN
KEYSTONE
5000
• High Efficiency Synchronous Buck Regulator with up to 97%
Efficiency
CONN-MINI TEST PT,
VERTICAL, RED, ROHS
P1, P2
CONN-MINI TEST PT,
VERTICAL, BLK, ROHS
KEYSTONE
5001
• 0.8% Reference Accuracy Over-Temperature/Load/Line
U3
IC-ADJ. 6A BUCK
REGULATOR, 20P, QFN,
3X4, ROHS
INTERSIL
ISL8016IRAJZ
R3
RES, SMD, 0402, 0Ω,
1/16W, 5%, TF, ROHS
VENKEL
H2510-00R00-1/16W-T
R2
RES, SMD, 0402, 100k,
1/16W, 1%, TF, ROHS
PANASONIC ERJ2RKF1003
R1
RES, SMD, 0402, 200k,
1/16W, 1%, TF, ROHS
ROHM
R4
RES, SMD, 0402, DNP,
DNP, DNP, TF, ROHS
• Fixed Output Voltage Option
• ±10% Output Voltage Margining
• Adjustable Current Limit
• Current Sharing Capable
• Start-up with Pre-Biased Output
• Internal Soft-Start - 1ms or Adjustable
• Soft-Stop Output Discharge During Disabled
• Adjustable Frequency from 500kHz to 4MHz - Default at 1MHz
IHLP2525CZERR68M01
MCR01MZPF2003
• External Synchronization up to 4MHz - Master to Slave Phase
Shifting Capability
Recommended Equipment
The following materials are recommended to perform testing:
• 0V to 10V Power Supply with at least 10A source current
capability or 5V battery
• Electronic Loads capable of sinking current up to 7A
• Digital Multimeters (DMMs)
• 100MHz quad-trace oscilloscope
• Signal generator
Quick Setup Guide
1. Ensure that the circuit is correctly connected to the supply
and loads prior to applying any power.
2. Connect the bias supply to VIN, the plus terminal to VIN and
the negative return to PGND.
3. Connect the output load to VOUT, the plus terminal to VO
and the negative return to PGND.
4. Verify the output voltage is 1.8V for VO.
March 31, 2011
AN1631.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Copyright Intersil Americas Inc. 2010. All Rights Reserved.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
L1
VIN
7
A
0
2
R3
8
9
10
VIN
1
2
C3
SGND
SYNCIN
VFB
FS
VSET
ISET
SS
COMP
12
13
14
15
16
EN
11
OPEN
C4
C5
A
PGND
SYNCOUT
R4
2
22UF 22UF 22UF
PGND
U3
ISL8016IRZ
PG
VOUT2
0.68UH
PGND
LX
LX
LX
VIN
VIN
EP
P1
3
6
22UF
4
C2
21
C1
22UF
5
VIN
1
20
19
18
R1
200K
R2
VO
C6
22UF
P2
C7
47PF
A
100K
17
A
Application Note 1631
VIN
A
FIGURE 1. ISL8016EVAL2Z SCHEMATIC
AN1631.0
FIGURE 2. TOP COMPONENTS
FIGURE 3. BOTTOM SILK SCREEN